pros and cons of mongodb

"Show the whole station system" and its discussion frame pros and cons, it is better to some practical, how do you think of my CMS system? Computer-side Access address: http://cmsdemo.youyax.com/ Phone-side access address: http://cmsdemo.youyax.com/m/ Of course, mobile phone access will automatically jump to the mobile version of the page The architecture of the system is different from the ordinary ent

Advantages:1. Asynchronous requests, do not prevent users from browsing the page or other operations.2. Local refresh without re-refreshing the page.3. Interface and application separation. Facilitates division of labor, reduces web application errors caused by non-technical changes to the page, improves efficiency, and is more applicable to the current publishing system.4. Standards-based support is widely available.5. Front-end and back-end load balancing. Minimize the burden on the server of

security.Speed, because the BIOS has a hardware self-test at boot time, and this function is implemented in the EFI partition, the UEFI is relatively fast to boot. --------UEFI+GPT is not a hard disk to produce more than two hundreds of m of small partition Ah, look comfortable oh yes an MSR, that is, Microsoft Reserved partition, basically useless, but some time the system upgrade needs to detect the existence of the partition. An ESP, the EFI system partition, is the EFI boot system partition

of the Web.5.AJAX points of attention and applicable and non-applicable scenarios(1). Attention PointWhen Ajax is developed, network latency-that is, the interval between a user sending a request to a server to make a response-requires careful consideration. Not giving users a clear response, without proper pre-reading data, or improper handling of XMLHttpRequest, will make users feel delayed, which users do not want to see, but they do not understand. A common solution is to use a visual compo

1. Internal JS: In the page directly in the tag to write JS codeAdvantages: Compared to the use of inline JS, the internal JS code is more centralized, and the page structure of the implementation of the code is less coupling, easier to maintainDisadvantage: JS code is limited to the use of the current page, the code can not be reused by multiple pages, resulting in a high degree of code redundancy2. External JS: Introduction of external JS file (recommended)Advantages: 1. Page code and JS code

Request data simultaneous parameter to transcode Chinese charactersGet data, all parameter information will be exposedThe Get method is compared to the Post method:Advantages:GET:1. The request is convenient, directly with a complete path to request data acquisition2. The request body will not be sent during the sending request, and the server's encapsulation will not be compromised. From this point of view, get is safe relative to post.POST:1. When the request is sent, the parameters are encaps

not appropriate to use it alone.The technique for solving this problem is to borrow a constructor, that is, to call the parent type constructor inside the sub-type constructor. This allows each instance to have its own properties, while also guaranteeing that only the constructor pattern is used to define the type. However, the result of using this method is that you cannot get the common method of the parent class, that is, prototype the method of binding through the prototype.The most used in

) data name: (NSString ) fileName{NSString *path = [self filepath:filename];[data writeToFile:path atomically:YES];}Get file path+ (nsstring*) FilePath: (nsstring*) FileName {nsarray* mypaths = Nssearchpathfordirectoriesindomains (NSDocumentDirectory, Nsuserdomainmask, YES);nsstring* Mydocpath = [Mypaths objectatindex:0];nsstring* FilePath = [Mydocpath stringbyappendingpathcomponent:filename];return filePath;}Fourth method: Database storageThe library for SQLite is preset in the iOS SDK. Develo

efficiency. NBSP; 2, the connection between the view and the controller is too tight. Views and controllers are separated from each other, but they do have a tight connection, the view has no controller, its application is very limited, and vice versa, which prevents them from being reused independently. NBSP; 3, view low-efficiency access to model data. Depending on the model operator interface, the view may need to be called multiple times to obtain sufficient display data. Unnecessary freque

add a new method to an interface, all classes that implement the interface must be modified synchronously to implement this method, otherwise they cannot be compiled.8, the implementation of the abstract class can only be given by its subclasses, and Java is a single inheritance, so the abstract class as a type definition tool performance is greatly compromised. Any class that implements an interface can have a type of this interface, and a class can implement multiple interfaces at the same ti

dispatched by the operating system. A Python interpreter process has a main thread and the execution thread for multiple user programs. Multi-threaded parallel execution is prohibited even on multicore CPU platforms due to the existence of the Gil. A compromise solution to this problem is discussed in more detail later in the Threads and Processes section. 　　Of course, Python also has some other small shortcomings, in this does not enumerate, I want to say that any language is not perfect,

: Universal code, a standard encoding, Python2 the encoding that is used by default. At least 16 bits are required to store. Other encodings are optimized for this encoding, such as UTF-8,GBK.UTF-8: Compression and refinement of Unicode (numbers, letters and ASCII codes using 8-bit encoding to store), Python3 default encoding used, European characters: 2 bytes, 16-bit storage; Chinese characters: 3 bytes, 24 bit storage　　Summary: Python3 default encoding is UTF-8, encoding conversion principle:

that processing 10,000 non-blocking IO requires no more than 10,000 threads, and you can use 1000 or 2000 threads for processing. Because the non-blocking IO processing connection is asynchronous. When a connection sends a request to the server, the server treats the connection request as a request "event" and assigns the "event" to the corresponding function. We can put this handler function in the thread to execute and return the thread after execution. Such a thread can handle multiple event

the pros and cons of using JavaScript (JScript) to write ASP programs (build ASP with Server-side JavaScript) and the experience summary. "Scheming" for a long time, finishing learning a lot of code. I just want to know where to write, keep on updating, and welcome colleagues who have had this kind of programming experience treatise, grateful. Advantages Summary: 1, C-style grammar {}, cordial, intoxicated

What are the pros and cons of keyword piling? Site to avoid the keyword piling traps, and then to do is the mentality, you can say that the state of mind occupy the optimization of the site ranked 60% successful, original site update you insist? Quality outside the chain do you have enough to do? To do SEO than is endurance, is to see who pay more. Keywords in Web pages: Practitioners may know that the

What is itBefore describing the difference and pros and cons, briefly introduce both.Functional programming, as the name suggests, this kind of programming is the function of thinking as the core, in this thinking angle to think about the problem. The most important foundation of this programming is the lambda calculus, which accepts functions as inputs and outputs.Object-oriented programming, which is the

Gossip does not say, we see the title, I use AAAAA and bbbbb two virtual Baidu to promote the account as an example for everyone to analyze the same promotion products of the different two accounts of the pros and cons. Let me first say a current state of the account: AAAAA This account gives the feeling is always very calm, this account of the key words, also on 5,000 words, but this account is still bett

null values in the database, and NULL is always the first in ascending order, so for different partition types, The MySQL database also handles null differently. For a range partition, if NULL is inserted into the partition column, the MySQL database puts the value in the leftmost partition, noting that if the partition is deleted, all content under the partition is deleted from the disk, the null partition is removed, and the null value is then deleted. To use null under the list partition, yo

This article focuses on encapsulating Ajax and asynchronous requests for Ajax, so let's take a look at this article. Ajax What exactly is Ajax? Ajax is a technique for creating interactive Web applications. Ajax application scenarios include: (map) real-time updates, form validation, etc... Advantages and disadvantages of Ajax: Pros: 1. Implement partial update (without refresh), 2. Reduces server-side stress Cons